java.lang.NullPointerException

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  • happened when saving a file. when reopen that file again, i can't reproduce this case. Exception is shown following {code} java.lang.NullPointerException at org.zkoss.poi.xssf.model.CommentsTable.findAuthor(CommentsTable.java:103) at org.zkoss.poi.xssf.usermodel.XSSFComment.setAuthor(XSSFComment.java:65) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportCell(AbstractExcelExporter.java:471) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportRow(AbstractExcelExporter.java:367) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportRowColumn(AbstractExcelExporter.java:329) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.export(AbstractExcelExporter.java:131) at org.zkoss.zss.api.impl.ExporterImpl.export(ExporterImpl.java:49) at org.zkoss.zss.app.repository.impl.SimpleRepository.exportBook(SimpleRepository.java:136) at org.zkoss.zss.app.repository.impl.SimpleRepository.save(SimpleRepository.java:91) at org.zkoss.zss.app.repository.impl.SimpleRepository.saveAs(SimpleRepository.java:157) at org.zkoss.zssex.app.impl.BookManagerEx.saveBook(BookManagerEx.java:83) at org.zkoss.zss.app.ui.AppCtrl$17.onEvent(AppCtrl.java:627) at org.zkoss.zss.app.ui.AppCtrl$17.onEvent(AppCtrl.java:615) at org.zkoss.zss.app.ui.dlg.DlgCtrlBase$1.onEvent(DlgCtrlBase.java:57) at org.zkoss.zk.ui.AbstractComponent.onEvent(AbstractComponent.java:2752) at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2723) at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2664) at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136) at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1765) at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1550) at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1260) at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:611) at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:485) at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:494) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701) {code}
    via by JerryChen,
  • happened when saving a file. when reopen that file again, i can't reproduce this case. Exception is shown following {code} java.lang.NullPointerException at org.zkoss.poi.xssf.model.CommentsTable.findAuthor(CommentsTable.java:103) at org.zkoss.poi.xssf.usermodel.XSSFComment.setAuthor(XSSFComment.java:65) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportCell(AbstractExcelExporter.java:471) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportRow(AbstractExcelExporter.java:367) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportRowColumn(AbstractExcelExporter.java:329) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.export(AbstractExcelExporter.java:131) at org.zkoss.zss.api.impl.ExporterImpl.export(ExporterImpl.java:49) at org.zkoss.zss.app.repository.impl.SimpleRepository.exportBook(SimpleRepository.java:136) at org.zkoss.zss.app.repository.impl.SimpleRepository.save(SimpleRepository.java:91) at org.zkoss.zss.app.repository.impl.SimpleRepository.saveAs(SimpleRepository.java:157) at org.zkoss.zssex.app.impl.BookManagerEx.saveBook(BookManagerEx.java:83) at org.zkoss.zss.app.ui.AppCtrl$17.onEvent(AppCtrl.java:627) at org.zkoss.zss.app.ui.AppCtrl$17.onEvent(AppCtrl.java:615) at org.zkoss.zss.app.ui.dlg.DlgCtrlBase$1.onEvent(DlgCtrlBase.java:57) at org.zkoss.zk.ui.AbstractComponent.onEvent(AbstractComponent.java:2752) at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2723) at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2664) at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136) at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1765) at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1550) at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1260) at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:611) at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:485) at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:494) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701) {code}
    via by JerryChen,
    • java.lang.NullPointerException at org.zkoss.poi.xssf.model.CommentsTable.findAuthor(CommentsTable.java:103) at org.zkoss.poi.xssf.usermodel.XSSFComment.setAuthor(XSSFComment.java:65) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportCell(AbstractExcelExporter.java:471) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportRow(AbstractExcelExporter.java:367) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.exportRowColumn(AbstractExcelExporter.java:329) at org.zkoss.zss.range.impl.imexp.AbstractExcelExporter.export(AbstractExcelExporter.java:131) at org.zkoss.zss.api.impl.ExporterImpl.export(ExporterImpl.java:49) at org.zkoss.zss.app.repository.impl.SimpleRepository.exportBook(SimpleRepository.java:136) at org.zkoss.zss.app.repository.impl.SimpleRepository.save(SimpleRepository.java:91) at org.zkoss.zss.app.repository.impl.SimpleRepository.saveAs(SimpleRepository.java:157) at org.zkoss.zssex.app.impl.BookManagerEx.saveBook(BookManagerEx.java:83) at org.zkoss.zss.app.ui.AppCtrl$17.onEvent(AppCtrl.java:627) at org.zkoss.zss.app.ui.AppCtrl$17.onEvent(AppCtrl.java:615) at org.zkoss.zss.app.ui.dlg.DlgCtrlBase$1.onEvent(DlgCtrlBase.java:57) at org.zkoss.zk.ui.AbstractComponent.onEvent(AbstractComponent.java:2752) at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2723) at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2664) at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136) at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1765) at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1550) at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1260) at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:611) at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:485) at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:494) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701)
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